Measuring usability
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Transcript of Measuring usability
Measuring UsabilityMartin Christensen
Agile & Lean UX designer Coach and teacher
Martin Christensen
History
Martin Christensen
Martin Christensen
My reason
Martin Christensen
Avoid the ‘hipster designer disorder’. It’s characterized by an intense need to create novel designs just to be different. Typically leads to unintuitive interfaces with astronomical implementation costs and low adoption.
- UX Apprentice (http://www.uxapprentice.com/design/)
Gather needs
”It took me a while to understand what to do. That’s because I’m stupid.”
= Learnability
Create a surveyLearnability =>
1. Rate this sentence on a scale from 1 to 7, where 1 is that you strongly disagree and 7 is that you strongly agree: I imagine that most people in the business would learn to use this product very quickly.
2. Rate this sentence on a scale from 1 to 7, where 1 is that you strongly disagree and 7 is that you strongly agree: I think that I need the support of a technical person to be able to use this product.
3. Rate this sentence on a scale from 1 to 7, where 1 is that you strongly disagree and 7 is that you strongly agree: I needed to learn a lot of things before I could get going with this product.
Visualize
Martin Christensen
Ease of use
Effectiveness
Efficiency
Satisfaction
Sense of being in control
Capability
Efficacy
Conviviality
Consistency
Simplicity
Learnability
Usability (mean value)
1
2
3
4
5
6
7Learnability
Create a baseline
Baseline
Ease of use
Effectiveness
Efficiency
Satisfaction
Sense of being in control
Capability
Efficacy
Conviviality
Consistency
Simplicity
Learnability
Usability (mean value)
1
2
3
4
5
6
7
Set target criteria
Martin Christensen
Baseline
Target criteria
Ease of use
Effectiveness
Efficiency
Satisfaction
Sense of being in control
Capability
Efficacy
Conviviality
Consistency
Simplicity
Learnability
Usability (mean value)
1
2
3
4
5
6
7
Martin Christensen
Measure
Baseline
Target criteria
Current level
Ease of use
Effectiveness
Efficiency
Satisfaction
Sense of being in control
Capability
Efficacy
Conviviality
Consistency
Simplicity
Learnability
Usability (mean value)
1
2
3
4
5
6
7
Visualize
Martin Christensen
Ease of use
Effectiveness
Efficiency
Satisfaction
Sense of being in control
Capability
Efficacy
Conviviality
Consistency
Simplicity
Learnability
Usability (mean value)
1
2
3
4
5
6
7
Baseline
Target criteria
Current level
Usability - Average of all the qualities below • Ease of use - The user friendliness and lack of complications
the user feels when carrying out tasks
• Effectiveness - Accuracy and completeness with which a user can achieve her goals
• Efficiency - Resources expended (time) in relation to the accuracy and completeness of achieving the goals
• Satisfaction - Comfort and acceptability of the product
• Capability - The user-perceived maturity of the product in regard to functionality helping the user to achieve her goals. ("Feature-completeness")
• Efficacy - The accommodation of a user’s continuous advancement in knowledge and skill.
• Conviviality - The politeness, friendliness and general pleasantness of the product
• Consistency - The user-perceived relation and familiarity between different parts of the product
• Simplicity - The lack of complexity the product exhibits and the lack of burden the user experiences when carrying out tasks
• Sense of being in control - The user’s feeling of knowing what to do and how to do it as well as being secure in doing it
• Learnability - The user-perceived level of learning and understanding required to use the product over time
Measure continuously
Martin Christensen
Baseline
Target
First version
Contextual help
Wizard always on
Voluntary guide system
Learnability
Reach
Martin Christensen
http://www.episerver.se/globalassets/events/customer-and-partner-day-swe/episerver-7.5-det-ar-detaljerna-som-gor-skillnaden.pdf
http://www.youtube.com/watch?v=1Zrjx6Oojnk
Peter Sunna, Product Manager at EPiServer
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